Catherine or Catarina of Portugal may refer to:
Catherine of Portugal (1436–1463), middle daughter of Edward, King of Portugal; nun at the Convent of Saint Claire. Catarina of Portugal (1540–1614), second daughter of Duarte, Duke of Guimarães (1515–1540); Duchess of Braganza by marriage to João I, Duke of Braganza and claimant to the throne of Portugal in 1580. Catherine of Braganza (1638–1705), younger daughter of King John IV of Portugal; Queen consort of England, Scotland, and Ireland by marriage to King Charles II. Catherine of Austria (1507–1578), daughter of Joanna and Philip of Castile; Queen consort of Portugal by marriage to King John III.
See also Princess Catherine Catherine of Castile Catherine (given name)